两天前，我已经在我的Visual Studio 2015中安装了Xamarin，它在工具下显示了Xamarin.下面，我描述了在Visual Studio 2015中安装Xamarin所遵循的方法.

I have installed Xamarin in my Visual Studio 2015 two days ago and it showing Xamarin under Tools. Below I have described the approach which I have followed to install Xamarin in Visual Studio 2015.

转到 控制面板 >> 程序功能 >> Visual Studio 2015 >> 更改 >> 修改

Go to Contol Panel >> Program Features >> Visual Studio 2015 >> Change>> Modify

1..在跨平台移动开发"下选择C#/.Net(Xamarin)

1. Select C#/.Net(Xamarin) under Cross Platform Mobile Development

2..检查是否选中了这三个红色标记的项目.

2. Check if these three red marked items are checked or not.

3.然后按update.它将下载在VS 2015上运行Xamarin所需的所有软件包.希望它对您有帮助！

3. And then press update.It will download all the required packages to run Xamarin on VS 2015.Hope it helps you!!